Improvement in governors for marine engines



UNITED STATES PATENT OEEIGE EDWARD T. JENKINS, OF WILLIAMSBURG,BROOKLYN, NEW YORK. l

IMPROMVEMENT IN GOVERNORS FOR MARiNE ENGINES.

Specification forming pari of Letters Patent No. 157,607, dated December8, 1874; application filed October 9, 1874.

To all whom. it may concern:

Be it known that I, EnWARD'THoMAs .TEN-- KINS, of Villiamsburg, in thecity of Brooklyn, in the county of Kings and State of New York, haveinvented certain Improvements in Marine-Engine Governors, of which thefollowing is a specification:

This inventionrelates to that class of marine-engine governors in whicha pendent Weight or pendulum, having its action controlled by the motionof the vessel, is made to regulate the supply of steam to the engine inaccordance with the varied immersion of the propeller or resistancerequired to operate it. The invention has not only this general objectin view in a more perfect manner than has heretofore been attained, butit is made, by

the motion of the vessel, to anticipate the re` quirements of the engineto the varied immersion or exposure of the propeller. To these ends theinvention consists in a combination with the pendent weight orpendulumand levers or devices for actuating the throttle or other valve, bywhich the supply of steam is regulated to the engine, of a trippingcam,which is controlled by the pendulum, and not only insures a gradualaction of the valve to increase or diminish the supply of steam inaccordance with the varying immersion of the propeller, but so that thevalve has an abrupt closing action at intervals to shut oft steam inadvance of the propellers leaving the water as the vessel is about topass over the crestof a wave, and so that there is an adequate supply ofsteam when the vessel is rising from the trough of the sea. The samegovernor, or an independent governor of similar construcv tion, may alsobe made to control the supply oi' injection-water to the engine `whenthe latter is'a condensing one. Y

Having thus specified the objects and nature ot' the invention, itsdescription will be proceeded with in reference to the accompa- 11 yingdrawing.

Figures l, 2, 3, and 4- represent side elevations ofthe governor indifferent Working positions, the arrows indicating the forward motion ofthe vessel, and Figs. 2, 3, and 4 showing one of the guide-platescarried by the pendulum removed. Fig. 5 is a central transverse verticalsection with the parts in the position represented in Fig. 2.

A is the pendent weight or pendulum, having its center of motion at b ina fixed portion, B, of the frame of the vessel. Attached to the bar ot'the pendulum, at any desired distance below the center of motion b, isan inclined guide, consisting of plates O O, the upper edges, c c, ofwhich form the inclined guidingsurfaces to gradually open `the valve Din the steam-pipe S, when the vessel is crossing and descending a wave,by the action of said inclined guide O O, as shown by dotted lines inFig. 3, and by full lines in Fig. l, on a roller, d, carried by a lever,E, having its fulcrum at c, and said lever connected by a rothf, withthe lever g, by which the valve D is actuated. Arranged within theplates of the guide O O, and pivoted thereto at h, is a cam, G, forming,when thrown or held up at its forward end,as shown in Figs. 2 and 4., anupper guide to gradually open the valve D, as the vessel is rising awave, by the action of said cam when raised on the roller d. Said cam israised during the dip of the vessel as it completes its descent of thewave by a hooked rear end of the cam striking the roller d, asrepresented in Fig. 4:. This action allows of a weighted detent orcatch, H, falling into position, as shown in Figs. 2 and 4, to lock orhold the cam G, so that the latter becomes the acting surface or inclineon the rollerd when the vessel is rising the Wave, and until the rollerd is struck by coming in contact with an upper or hooked end of thecatch H, as shown in Fig. 3, and which immediately allows of the cam Gdropping onto a spring-cushion, i, and into the position represented bydotted lines in Fig. 3, causing the valve, by the weight of the lever Eor other self-acting means, to close, and so that when the vessel dipsagain the roller d, by its outside anges, runs on the inclined guide OC, or rather the latter, by means of the pendulum, then acts on saidroller to gradually open the valve, until the cam G is again raised bythe roller d coming in contact with the hooked rear end of the pivotedcam G.

By this combination and arrangement of parts, while the vessel is risingfrom the trough of the sea to the crest of a Wave, the valve D continuesopening by the action of the cam G on the roller d, from, say, more thanone-halt' to a full head of steam, and just before the vessel begins toturn from a rising to a dipping motion, and to cross the Wave, theroller d, striking the upper end ofthe catch H, trips the governor byreleasing the cam G, allowing the latter to drop, which shuts off thesteam in advanceof the propellers coming out of the Water. This bringsthe roller d down onto the guide G O, and as the vessel crosses the Wavethe valve opens gradually to about half a head of steam (more or less)by the action of the guide C C, due to the changed relative position ofthe pendulum on the roller d, and continues to open as the vessel dipsor passes to and ascends the next Wave, the cam G acting on the valveduring the rising ofthe vessel, as hereinbefore described, and till sheis about to again cross over the crest of the next Wave, when, orimmediately before, the governor is again tripped, and the valve closed.The gradual opening of the valve is regulated by the curvature orinclination of the guide C C and the cam G.

This description of paris applies to vessels having screW-propellers atthe stern. Substantially the same combination of devices,

however, suitably modified or arranged, may

be applied to side-wheel steamers, said parts being so timed, shaped, orpitched as to give a full supply of steam when the vessel is rising andcrossing a Wave, and to partially shut oft' the steam when she isdescending and passing through the trough of the sea, opening the valveagain. as she rises, and continuing to open it as shecrosses the Wave,but tripping and closingthe valve'as she commences to descend.

To prevent any undue restraint on the governor by the rolling action ofthe vessel, friction rollers or guides may be applied to the pendulum.

The same governor may also be made to control the injection cock orvalve of the engine when the latter is a condensingV one, or anindependent governor of similar construction may be used for suchpurpose.

I claiml. The combination of the pendulum, the

regulating-valve, and a tripping-cam, carried by the pendulum,substantially as and for the purpose herein described.

2. The combination, Witlrtlie pendulum A, of the attached incline G G,the pivoted cam G, the catch H, and the valvelever E, with itsattachment or roller d, essentially as and for the purposes herein setforth.

EDWD. T. JENKINS. Witnesses:

HENRY T. BROWN, MICHAEL RYAN.

